
/*背景图*/

.a_background{
    width: 100%;
    height: 100%;
    position: absolute;
}

.a_background_top{
    width:100%;
    height: 71.6%;
    background :url("../images/background/a_background_top.png");
    background-size: 100% 100%;
}
.a_background_middle{
    width:100%;
    height:13.1%;
    background: url("../images/background/a_background_middle.png");
    background-size: 100% 100%;
}

.a_background_bottom{
    width: 100%;
    height: 15.3%;
    background: url("../images/background/a_background_botton.png");
    background-size: 100% 100%;
}
